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BSI PD IEC TR 61850-7-5:2021

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Communication networks and systems for power utility automation – IEC 61850 Modelling concepts

Published By Publication Date Number of Pages
BSI 2021 36
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This part of IEC 61850, which is a technical report, establishes modelling concepts that help the user to understand how to apply the models defined in IEC 61850-7-4 and IEC 61850-7-3 to implement practical applications.

This document provides the basic concepts that are valid for all application domains using IEC 61850. Domain specific concepts are defined in other technical reports as in the document range of IEC 61850-7-5xx; as an example, IEC 61850-7-500 describes modelling concepts for functions related to substation automation.

On one side the number of potential topics for cross-domain modelling may be very high but on the other side it may be limited by domain specific restrictions often created by the historical evolution of IEC 61850 in the domains.

The first topic selected is the common control of power utility primary objects by means of the power utility automation systems based mainly on the long experience in substation automation systems. Common attributes for reliable power utility automation systems in all domains are quality and health. A special function having a broad application range in power utility automation systems is the scheduling of services as provided by the domain distributed energy resources (DER) used in smart grids, especially also for electric mobility. Not yet so much discussed in the context of IEC 61850 but very important for all IEDs is the impact of restart (power cycle) on the data model parameters. Non-agreed behaviour will raise problems for interoperability in multi-vendor systems.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
10 3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
4 Control
4.1 Control authorization
4.1.1 Basics
11 4.1.2 Validating a control request
Figures
Figure 1 – Communication vs. application layer model for controls
12 Tables
Table 1 – Dependence of checking Interlocking (IL) conditionson the control command and on the server configuration
13 Table 2 – Dependence of checking synchronism (CS) conditionson the control command and on the server configuration
14 4.1.3 Exclusive control authorization for one out of multiple actors of the same level of control hierarchy
Figure 2 – Different levels of control authority (example)
15 4.1.4 Different control permissions for different actors of the same level of control hierarchy
4.2 Control authority for process equipment
4.2.1 Control commands for process equipment from automations instead of HMI
16 Table 3 – Use case 1 definition
17 5 Quality and its propagation
5.1 Standard processing principle
5.1.1 General
5.1.2 Respecting behaviour
18 5.1.3 LN specific calculations
5.1.4 detailQual is not propagated
5.1.5 Configurable propagation of the value of the element ‘source’
5.1.6 operatorBlocked is not propagated
5.2 Special processing principle for (single phase) XCBR mapping to CSWI
5.2.1 General
19 Figure 3 – Single-phase monitoring of the CB position
20 5.2.2 Respecting the Behaviour
5.2.3 LN specific calculations
5.2.4 Propagation of detailQual
5.2.5 Substitution of switchgear position signals
21 5.2.6 operatorBlocked is not propagated
5.3 Conclusion
Table 4 – Example of fixed rules: Boolean OR out of two input signals
22 6 Health and its application
6.1 General
6.2 The use of LPHD.PhyHealth, LLN0.Health, LN.Health and LN.EEHealth
23 Table 5 – Health in IEC 61850-7-4
24 6.3 Health in Proxy-IEDs, in LNs of type Mirror and in a LD hierarchy
25 Figure 4 – Examples of use of Health and EEHealth in models
26 7 Special functions
7.1 Use of cross domain schedules and scheduler
7.1.1 Introduction
Figure 5 – FSCH and FSCC LN class
27 7.1.2 Example 1
Figure 6 – State Machine
Figure 7 – Relation between schedule controller, schedules and entity scheduled
28 Figure 8 – Use case charging architecture
29 Figure 9 – LN instances and relationships in example 1
Figure 10 – Timelines associated to the example 1
30 7.1.3 Example 2
Figure 11 – LN instances and relationships in example 2
32 Figure 12 – Timelines associated to the example 2
33 8 Restoration of functions/communication after IED restart (power cycle)
8.1 Functional description
8.2 Priorities
8.3 Stored and non-stored data
34 Table 6 – Examples for stored and non-stored data for restart
35 Bibliography
BSI PD IEC TR 61850-7-5:2021
$167.15